<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.city}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div
            class="button-wrapper"
            v-for="item of hotCities"
            :key="item.id"
            @click="handleCityClick(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(city,key) of cities"  :ref="key" :key="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div
            class="item border-bottom"
            v-for="item of city"
            :key="item.id"
            @click="handleCityClick(item.name)"
          >
            {{item.name}}
          </div>
        </div>
      </div>
    </div>

  </div>
</template>

<script>
  import { mapState,mapMutations } from 'vuex'
  import Bscroll from 'better-scroll'
  export default {
    name: "cityList",
    mounted(){
      this.scroll = new Bscroll(this.$refs.wrapper)
    },
    props:{
      cities:Object,
      hotCities:Array,
      letter: String
    },
    watch : {
      letter(){
        if(this.letter){
          const element = this.$refs[this.letter][0]

          this.scroll.scrollToElement(element)
        }
      }
    },
    methods:{
      handleCityClick(city){
        this.changeCity(city)
        this.$router.push('/')
      },
      ...mapMutations(['changeCity'])
    },
    computed:{
      ...mapState({city:'city'})
    }
  }
</script>

<style lang="stylus" scoped>
  @import "~style/varibles.styl"
  .border-topbottom
    &:before
      border-color #ccc
    &:after
      border-color #ccc
  .border-bottom
    &:before
      border-color #ccc
  .list
    overflow: hidden
    position: absolute
    top:1.58rem
    left: 0
    right 0
    bottom 0
    .title
      line-height:.54rem
      background: #f5f5f5
      padding-left: .2rem
      color #666
      font-size .26rem
    .area
      .button-list
        padding .1rem .6rem .1rem .1rem
        overflow: hidden
        .button-wrapper
          float: left
          width 33.3%
          .button
            text-align center
            border .02rem solid #ccc
            border-radius .08rem
            padding .1rem 0
            margin .1rem
    .item-list
      .item
        line-height:.76rem
        padding-left:.2rem
</style>
